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Finding the Fourth Proportional to 391,539.71, 587,419.82 and 151,726.05

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Solution

The fourth proportional to 391,539.71, 587,419.82 and 151,726.05 is: 227,631.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,539.71 : 587,419.82 = 151,726.05 : x
  2. Step 2: Convert to fraction form
    391,539.71/587,419.82 = 151,726.05/x
  3. Step 3: Cross multiply
    391,539.71x = 587,419.82 × 151,726.05
  4. Step 4: Simplify right side
    391,539.71x = 89,126,888,221.68
  5. Step 5: Solve for x
    x = 89,126,888,221.68/391,539.71
  6. Step 6: Final answer
    x = 227,631.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.